chore: clean up whitespace in mkdocs.yml config file

Author: danceratopz

README.md

@@ -137,7 +137,7 @@ This guide installs stable versions of the required external (go-ethereum) `evm`
 
 ## Usage
 
-More information on how to obtain and use the [released test fixtures](https://github.com/ethereum/execution-spec-tests/releases) can be found [here](getting_started/using_fixtures.md).
+More information on how to obtain and use the [released test fixtures](https://github.com/ethereum/execution-spec-tests/releases) can be found [here](https://ethereum.github.io/execution-spec-tests/docs-only/getting_started/using_fixtures/).
 
 For further help with working with this codebase, see the [online documentation](https://ethereum.github.io/execution-spec-tests/):
 

mkdocs.yml

@@ -81,7 +81,7 @@ markdown_extensions:
   - pymdownx.caret
   - pymdownx.details
   - pymdownx.emoji:
-      emoji_index: !!python/name:material.extensions.emoji.twemoji 
+      emoji_index: !!python/name:material.extensions.emoji.twemoji
       emoji_generator: !!python/name:material.extensions.emoji.to_svg
   - pymdownx.highlight
   - pymdownx.inlinehilite